Clock



FIG. 1A is a front elevation view of the clock;

FIG. 2 is a rear elevation view of the clock;

FIG. 3 is a side view of the clock;

FIG. 4 is a bottom view of the clock;

FIG. 5 is a top and right front perspective view of the clock; and,

FIG. 6 is a bottom view of the clock.

The numerals of the clock display are provided by an electro-luminescent display on a glass substrate. 

The ornamental design for clock, as shown and described. 